Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * pSeries_lpar.c | |
3 | * Copyright (C) 2001 Todd Inglett, IBM Corporation | |
4 | * | |
5 | * pSeries LPAR support. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
f7ebf352 ME |
22 | /* Enables debugging of low-level hash table routines - careful! */ |
23 | #undef DEBUG | |
1da177e4 | 24 | |
1da177e4 LT |
25 | #include <linux/kernel.h> |
26 | #include <linux/dma-mapping.h> | |
463ce0e1 | 27 | #include <linux/console.h> |
66b15db6 | 28 | #include <linux/export.h> |
58995a9a | 29 | #include <linux/jump_label.h> |
1da177e4 LT |
30 | #include <asm/processor.h> |
31 | #include <asm/mmu.h> | |
32 | #include <asm/page.h> | |
33 | #include <asm/pgtable.h> | |
34 | #include <asm/machdep.h> | |
1da177e4 | 35 | #include <asm/mmu_context.h> |
1da177e4 LT |
36 | #include <asm/iommu.h> |
37 | #include <asm/tlbflush.h> | |
38 | #include <asm/tlb.h> | |
39 | #include <asm/prom.h> | |
1da177e4 | 40 | #include <asm/cputable.h> |
dcad47fc | 41 | #include <asm/udbg.h> |
2249ca9d | 42 | #include <asm/smp.h> |
c8cd093a | 43 | #include <asm/trace.h> |
f5339277 | 44 | #include <asm/firmware.h> |
212bebb4 | 45 | #include <asm/plpar_wrappers.h> |
c1caae3d | 46 | #include <asm/kexec.h> |
408cddd9 | 47 | #include <asm/fadump.h> |
a1218720 | 48 | |
21cf9133 | 49 | #include "pseries.h" |
1da177e4 | 50 | |
1a527286 AK |
51 | /* Flag bits for H_BULK_REMOVE */ |
52 | #define HBR_REQUEST 0x4000000000000000UL | |
53 | #define HBR_RESPONSE 0x8000000000000000UL | |
54 | #define HBR_END 0xc000000000000000UL | |
55 | #define HBR_AVPN 0x0200000000000000UL | |
56 | #define HBR_ANDCOND 0x0100000000000000UL | |
57 | ||
1da177e4 | 58 | |
b9377ffc | 59 | /* in hvCall.S */ |
1da177e4 | 60 | EXPORT_SYMBOL(plpar_hcall); |
b9377ffc | 61 | EXPORT_SYMBOL(plpar_hcall9); |
1da177e4 | 62 | EXPORT_SYMBOL(plpar_hcall_norets); |
b9377ffc | 63 | |
1da177e4 LT |
64 | void vpa_init(int cpu) |
65 | { | |
66 | int hwcpu = get_hard_smp_processor_id(cpu); | |
2f6093c8 | 67 | unsigned long addr; |
1da177e4 | 68 | long ret; |
cf9efce0 PM |
69 | struct paca_struct *pp; |
70 | struct dtl_entry *dtl; | |
233ccd0d | 71 | |
b89bdfb8 ME |
72 | /* |
73 | * The spec says it "may be problematic" if CPU x registers the VPA of | |
74 | * CPU y. We should never do that, but wail if we ever do. | |
75 | */ | |
76 | WARN_ON(cpu != smp_processor_id()); | |
77 | ||
233ccd0d | 78 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
8154c5d2 | 79 | lppaca_of(cpu).vmxregs_in_use = 1; |
233ccd0d | 80 | |
6e0b8bc9 ME |
81 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
82 | lppaca_of(cpu).ebb_regs_in_use = 1; | |
83 | ||
8154c5d2 | 84 | addr = __pa(&lppaca_of(cpu)); |
2f6093c8 | 85 | ret = register_vpa(hwcpu, addr); |
1da177e4 | 86 | |
2f6093c8 | 87 | if (ret) { |
711ef84e AB |
88 | pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " |
89 | "%lx failed with %ld\n", cpu, hwcpu, addr, ret); | |
2f6093c8 MN |
90 | return; |
91 | } | |
d8c476ee AK |
92 | |
93 | #ifdef CONFIG_PPC_STD_MMU_64 | |
2f6093c8 MN |
94 | /* |
95 | * PAPR says this feature is SLB-Buffer but firmware never | |
96 | * reports that. All SPLPAR support SLB shadow buffer. | |
97 | */ | |
d8c476ee AK |
98 | if (!radix_enabled() && firmware_has_feature(FW_FEATURE_SPLPAR)) { |
99 | addr = __pa(paca[cpu].slb_shadow_ptr); | |
2f6093c8 MN |
100 | ret = register_slb_shadow(hwcpu, addr); |
101 | if (ret) | |
711ef84e AB |
102 | pr_err("WARNING: SLB shadow buffer registration for " |
103 | "cpu %d (hw %d) of area %lx failed with %ld\n", | |
104 | cpu, hwcpu, addr, ret); | |
2f6093c8 | 105 | } |
d8c476ee | 106 | #endif /* CONFIG_PPC_STD_MMU_64 */ |
cf9efce0 PM |
107 | |
108 | /* | |
109 | * Register dispatch trace log, if one has been allocated. | |
110 | */ | |
111 | pp = &paca[cpu]; | |
112 | dtl = pp->dispatch_log; | |
113 | if (dtl) { | |
114 | pp->dtl_ridx = 0; | |
115 | pp->dtl_curr = dtl; | |
116 | lppaca_of(cpu).dtl_idx = 0; | |
117 | ||
118 | /* hypervisor reads buffer length from this field */ | |
7ffcf8ec | 119 | dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); |
cf9efce0 PM |
120 | ret = register_dtl(hwcpu, __pa(dtl)); |
121 | if (ret) | |
711ef84e AB |
122 | pr_err("WARNING: DTL registration of cpu %d (hw %d) " |
123 | "failed with %ld\n", smp_processor_id(), | |
124 | hwcpu, ret); | |
cf9efce0 PM |
125 | lppaca_of(cpu).dtl_enable_mask = 2; |
126 | } | |
1da177e4 LT |
127 | } |
128 | ||
d8c476ee AK |
129 | #ifdef CONFIG_PPC_STD_MMU_64 |
130 | ||
035223fb | 131 | static long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
5524a27d AK |
132 | unsigned long vpn, unsigned long pa, |
133 | unsigned long rflags, unsigned long vflags, | |
b1022fbd | 134 | int psize, int apsize, int ssize) |
1da177e4 | 135 | { |
1da177e4 LT |
136 | unsigned long lpar_rc; |
137 | unsigned long flags; | |
138 | unsigned long slot; | |
96e28449 | 139 | unsigned long hpte_v, hpte_r; |
1da177e4 | 140 | |
3c726f8d | 141 | if (!(vflags & HPTE_V_BOLTED)) |
5524a27d AK |
142 | pr_devel("hpte_insert(group=%lx, vpn=%016lx, " |
143 | "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n", | |
144 | hpte_group, vpn, pa, rflags, vflags, psize); | |
3c726f8d | 145 | |
b1022fbd | 146 | hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID; |
50de596d | 147 | hpte_r = hpte_encode_r(pa, psize, apsize, ssize) | rflags; |
3c726f8d BH |
148 | |
149 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 150 | pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
3c726f8d | 151 | |
1da177e4 LT |
152 | /* Now fill in the actual HPTE */ |
153 | /* Set CEC cookie to 0 */ | |
154 | /* Zero page = 0 */ | |
155 | /* I-cache Invalidate = 0 */ | |
156 | /* I-cache synchronize = 0 */ | |
157 | /* Exact = 0 */ | |
158 | flags = 0; | |
159 | ||
9ee820fa BK |
160 | if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) |
161 | flags |= H_COALESCE_CAND; | |
1da177e4 | 162 | |
b9377ffc | 163 | lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); |
706c8c93 | 164 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
3c726f8d | 165 | if (!(vflags & HPTE_V_BOLTED)) |
551a232c | 166 | pr_devel(" full\n"); |
1da177e4 | 167 | return -1; |
3c726f8d | 168 | } |
1da177e4 LT |
169 | |
170 | /* | |
171 | * Since we try and ioremap PHBs we don't own, the pte insert | |
172 | * will fail. However we must catch the failure in hash_page | |
173 | * or we will loop forever, so return -2 in this case. | |
174 | */ | |
706c8c93 | 175 | if (unlikely(lpar_rc != H_SUCCESS)) { |
3c726f8d | 176 | if (!(vflags & HPTE_V_BOLTED)) |
4b8f63d9 | 177 | pr_devel(" lpar err %ld\n", lpar_rc); |
1da177e4 | 178 | return -2; |
3c726f8d BH |
179 | } |
180 | if (!(vflags & HPTE_V_BOLTED)) | |
551a232c | 181 | pr_devel(" -> slot: %lu\n", slot & 7); |
1da177e4 LT |
182 | |
183 | /* Because of iSeries, we have to pass down the secondary | |
184 | * bucket bit here as well | |
185 | */ | |
96e28449 | 186 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
1da177e4 LT |
187 | } |
188 | ||
189 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); | |
190 | ||
191 | static long pSeries_lpar_hpte_remove(unsigned long hpte_group) | |
192 | { | |
193 | unsigned long slot_offset; | |
194 | unsigned long lpar_rc; | |
195 | int i; | |
196 | unsigned long dummy1, dummy2; | |
197 | ||
198 | /* pick a random slot to start at */ | |
199 | slot_offset = mftb() & 0x7; | |
200 | ||
201 | for (i = 0; i < HPTES_PER_GROUP; i++) { | |
202 | ||
203 | /* don't remove a bolted entry */ | |
204 | lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, | |
205 | (0x1UL << 4), &dummy1, &dummy2); | |
706c8c93 | 206 | if (lpar_rc == H_SUCCESS) |
1da177e4 | 207 | return i; |
9fb26401 MW |
208 | |
209 | /* | |
210 | * The test for adjunct partition is performed before the | |
211 | * ANDCOND test. H_RESOURCE may be returned, so we need to | |
212 | * check for that as well. | |
213 | */ | |
214 | BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE); | |
1da177e4 LT |
215 | |
216 | slot_offset++; | |
217 | slot_offset &= 0x7; | |
218 | } | |
219 | ||
220 | return -1; | |
221 | } | |
222 | ||
223 | static void pSeries_lpar_hptab_clear(void) | |
224 | { | |
225 | unsigned long size_bytes = 1UL << ppc64_pft_size; | |
226 | unsigned long hpte_count = size_bytes >> 4; | |
d504bed6 MN |
227 | struct { |
228 | unsigned long pteh; | |
229 | unsigned long ptel; | |
230 | } ptes[4]; | |
b7abc5c5 | 231 | long lpar_rc; |
bed9a315 | 232 | unsigned long i, j; |
d504bed6 MN |
233 | |
234 | /* Read in batches of 4, | |
235 | * invalidate only valid entries not in the VRMA | |
236 | * hpte_count will be a multiple of 4 | |
237 | */ | |
238 | for (i = 0; i < hpte_count; i += 4) { | |
239 | lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes); | |
240 | if (lpar_rc != H_SUCCESS) | |
241 | continue; | |
242 | for (j = 0; j < 4; j++){ | |
243 | if ((ptes[j].pteh & HPTE_V_VRMA_MASK) == | |
244 | HPTE_V_VRMA_MASK) | |
245 | continue; | |
246 | if (ptes[j].pteh & HPTE_V_VALID) | |
247 | plpar_pte_remove_raw(0, i + j, 0, | |
248 | &(ptes[j].pteh), &(ptes[j].ptel)); | |
b7abc5c5 SS |
249 | } |
250 | } | |
e844b1ee AB |
251 | |
252 | #ifdef __LITTLE_ENDIAN__ | |
408cddd9 HB |
253 | /* |
254 | * Reset exceptions to big endian. | |
255 | * | |
256 | * FIXME this is a hack for kexec, we need to reset the exception | |
257 | * endian before starting the new kernel and this is a convenient place | |
258 | * to do it. | |
259 | * | |
260 | * This is also called on boot when a fadump happens. In that case we | |
261 | * must not change the exception endian mode. | |
262 | */ | |
263 | if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active()) { | |
e844b1ee AB |
264 | long rc; |
265 | ||
266 | rc = pseries_big_endian_exceptions(); | |
267 | /* | |
268 | * At this point it is unlikely panic() will get anything | |
269 | * out to the user, but at least this will stop us from | |
270 | * continuing on further and creating an even more | |
271 | * difficult to debug situation. | |
c1caae3d HB |
272 | * |
273 | * There is a known problem when kdump'ing, if cpus are offline | |
274 | * the above call will fail. Rather than panicking again, keep | |
275 | * going and hope the kdump kernel is also little endian, which | |
276 | * it usually is. | |
e844b1ee | 277 | */ |
c1caae3d | 278 | if (rc && !kdump_in_progress()) |
e844b1ee AB |
279 | panic("Could not enable big endian exceptions"); |
280 | } | |
281 | #endif | |
1da177e4 LT |
282 | } |
283 | ||
284 | /* | |
285 | * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and | |
286 | * the low 3 bits of flags happen to line up. So no transform is needed. | |
287 | * We can probably optimize here and assume the high bits of newpp are | |
288 | * already zero. For now I am paranoid. | |
289 | */ | |
3c726f8d BH |
290 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
291 | unsigned long newpp, | |
5524a27d | 292 | unsigned long vpn, |
db3d8534 | 293 | int psize, int apsize, |
aefa5688 | 294 | int ssize, unsigned long inv_flags) |
1da177e4 LT |
295 | { |
296 | unsigned long lpar_rc; | |
297 | unsigned long flags = (newpp & 7) | H_AVPN; | |
3c726f8d | 298 | unsigned long want_v; |
1da177e4 | 299 | |
5524a27d | 300 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1da177e4 | 301 | |
551a232c | 302 | pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", |
f7ebf352 | 303 | want_v, slot, flags, psize); |
1da177e4 | 304 | |
1189be65 | 305 | lpar_rc = plpar_pte_protect(flags, slot, want_v); |
3c726f8d | 306 | |
706c8c93 | 307 | if (lpar_rc == H_NOT_FOUND) { |
551a232c | 308 | pr_devel("not found !\n"); |
1da177e4 | 309 | return -1; |
3c726f8d BH |
310 | } |
311 | ||
551a232c | 312 | pr_devel("ok\n"); |
1da177e4 | 313 | |
706c8c93 | 314 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
315 | |
316 | return 0; | |
317 | } | |
318 | ||
4ad90c86 | 319 | static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_group) |
1da177e4 | 320 | { |
4ad90c86 AK |
321 | long lpar_rc; |
322 | unsigned long i, j; | |
323 | struct { | |
324 | unsigned long pteh; | |
325 | unsigned long ptel; | |
326 | } ptes[4]; | |
1da177e4 | 327 | |
4ad90c86 | 328 | for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) { |
1da177e4 | 329 | |
4ad90c86 AK |
330 | lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes); |
331 | if (lpar_rc != H_SUCCESS) | |
332 | continue; | |
1da177e4 | 333 | |
4ad90c86 AK |
334 | for (j = 0; j < 4; j++) { |
335 | if (HPTE_V_COMPARE(ptes[j].pteh, want_v) && | |
336 | (ptes[j].pteh & HPTE_V_VALID)) | |
337 | return i + j; | |
338 | } | |
339 | } | |
1da177e4 | 340 | |
4ad90c86 | 341 | return -1; |
1da177e4 LT |
342 | } |
343 | ||
5524a27d | 344 | static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) |
1da177e4 | 345 | { |
1da177e4 | 346 | long slot; |
4ad90c86 AK |
347 | unsigned long hash; |
348 | unsigned long want_v; | |
349 | unsigned long hpte_group; | |
1da177e4 | 350 | |
5524a27d AK |
351 | hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); |
352 | want_v = hpte_encode_avpn(vpn, psize, ssize); | |
1189be65 PM |
353 | |
354 | /* Bolted entries are always in the primary group */ | |
4ad90c86 AK |
355 | hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP; |
356 | slot = __pSeries_lpar_hpte_find(want_v, hpte_group); | |
357 | if (slot < 0) | |
358 | return -1; | |
359 | return hpte_group + slot; | |
360 | } | |
1da177e4 LT |
361 | |
362 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, | |
3c726f8d | 363 | unsigned long ea, |
1189be65 | 364 | int psize, int ssize) |
1da177e4 | 365 | { |
5524a27d AK |
366 | unsigned long vpn; |
367 | unsigned long lpar_rc, slot, vsid, flags; | |
1da177e4 | 368 | |
1189be65 | 369 | vsid = get_kernel_vsid(ea, ssize); |
5524a27d | 370 | vpn = hpt_vpn(ea, vsid, ssize); |
1da177e4 | 371 | |
5524a27d | 372 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
1da177e4 LT |
373 | BUG_ON(slot == -1); |
374 | ||
375 | flags = newpp & 7; | |
376 | lpar_rc = plpar_pte_protect(flags, slot, 0); | |
377 | ||
706c8c93 | 378 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
379 | } |
380 | ||
5524a27d | 381 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, |
db3d8534 AK |
382 | int psize, int apsize, |
383 | int ssize, int local) | |
1da177e4 | 384 | { |
3c726f8d | 385 | unsigned long want_v; |
1da177e4 LT |
386 | unsigned long lpar_rc; |
387 | unsigned long dummy1, dummy2; | |
388 | ||
5524a27d AK |
389 | pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", |
390 | slot, vpn, psize, local); | |
1da177e4 | 391 | |
5524a27d | 392 | want_v = hpte_encode_avpn(vpn, psize, ssize); |
1189be65 | 393 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); |
706c8c93 | 394 | if (lpar_rc == H_NOT_FOUND) |
1da177e4 LT |
395 | return; |
396 | ||
706c8c93 | 397 | BUG_ON(lpar_rc != H_SUCCESS); |
1da177e4 LT |
398 | } |
399 | ||
e34aa03c | 400 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
1a527286 AK |
401 | /* |
402 | * Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need | |
403 | * to make sure that we avoid bouncing the hypervisor tlbie lock. | |
404 | */ | |
405 | #define PPC64_HUGE_HPTE_BATCH 12 | |
406 | ||
407 | static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot, | |
408 | unsigned long *vpn, int count, | |
409 | int psize, int ssize) | |
410 | { | |
411 | unsigned long param[8]; | |
412 | int i = 0, pix = 0, rc; | |
413 | unsigned long flags = 0; | |
414 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); | |
415 | ||
416 | if (lock_tlbie) | |
417 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
418 | ||
419 | for (i = 0; i < count; i++) { | |
420 | ||
421 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
422 | pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0, | |
423 | ssize, 0); | |
424 | } else { | |
425 | param[pix] = HBR_REQUEST | HBR_AVPN | slot[i]; | |
426 | param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize); | |
427 | pix += 2; | |
428 | if (pix == 8) { | |
429 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
430 | param[0], param[1], param[2], | |
431 | param[3], param[4], param[5], | |
432 | param[6], param[7]); | |
433 | BUG_ON(rc != H_SUCCESS); | |
434 | pix = 0; | |
435 | } | |
436 | } | |
437 | } | |
438 | if (pix) { | |
439 | param[pix] = HBR_END; | |
440 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
441 | param[2], param[3], param[4], param[5], | |
442 | param[6], param[7]); | |
443 | BUG_ON(rc != H_SUCCESS); | |
444 | } | |
445 | ||
446 | if (lock_tlbie) | |
447 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
448 | } | |
449 | ||
fa1f8ae8 AK |
450 | static void pSeries_lpar_hugepage_invalidate(unsigned long vsid, |
451 | unsigned long addr, | |
452 | unsigned char *hpte_slot_array, | |
d557b098 | 453 | int psize, int ssize, int local) |
1a527286 | 454 | { |
fa1f8ae8 | 455 | int i, index = 0; |
1a527286 AK |
456 | unsigned long s_addr = addr; |
457 | unsigned int max_hpte_count, valid; | |
458 | unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH]; | |
459 | unsigned long slot_array[PPC64_HUGE_HPTE_BATCH]; | |
fa1f8ae8 | 460 | unsigned long shift, hidx, vpn = 0, hash, slot; |
1a527286 AK |
461 | |
462 | shift = mmu_psize_defs[psize].shift; | |
463 | max_hpte_count = 1U << (PMD_SHIFT - shift); | |
464 | ||
465 | for (i = 0; i < max_hpte_count; i++) { | |
466 | valid = hpte_valid(hpte_slot_array, i); | |
467 | if (!valid) | |
468 | continue; | |
469 | hidx = hpte_hash_index(hpte_slot_array, i); | |
470 | ||
471 | /* get the vpn */ | |
472 | addr = s_addr + (i * (1ul << shift)); | |
1a527286 AK |
473 | vpn = hpt_vpn(addr, vsid, ssize); |
474 | hash = hpt_hash(vpn, shift, ssize); | |
475 | if (hidx & _PTEIDX_SECONDARY) | |
476 | hash = ~hash; | |
477 | ||
478 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
479 | slot += hidx & _PTEIDX_GROUP_IX; | |
480 | ||
481 | slot_array[index] = slot; | |
482 | vpn_array[index] = vpn; | |
483 | if (index == PPC64_HUGE_HPTE_BATCH - 1) { | |
484 | /* | |
485 | * Now do a bluk invalidate | |
486 | */ | |
487 | __pSeries_lpar_hugepage_invalidate(slot_array, | |
488 | vpn_array, | |
489 | PPC64_HUGE_HPTE_BATCH, | |
490 | psize, ssize); | |
491 | index = 0; | |
492 | } else | |
493 | index++; | |
494 | } | |
495 | if (index) | |
496 | __pSeries_lpar_hugepage_invalidate(slot_array, vpn_array, | |
497 | index, psize, ssize); | |
498 | } | |
e34aa03c AK |
499 | #else |
500 | static void pSeries_lpar_hugepage_invalidate(unsigned long vsid, | |
501 | unsigned long addr, | |
502 | unsigned char *hpte_slot_array, | |
503 | int psize, int ssize, int local) | |
504 | { | |
505 | WARN(1, "%s called without THP support\n", __func__); | |
506 | } | |
507 | #endif | |
1a527286 | 508 | |
27828f98 DG |
509 | static int pSeries_lpar_hpte_removebolted(unsigned long ea, |
510 | int psize, int ssize) | |
f8c8803b | 511 | { |
5524a27d AK |
512 | unsigned long vpn; |
513 | unsigned long slot, vsid; | |
f8c8803b BP |
514 | |
515 | vsid = get_kernel_vsid(ea, ssize); | |
5524a27d | 516 | vpn = hpt_vpn(ea, vsid, ssize); |
f8c8803b | 517 | |
5524a27d | 518 | slot = pSeries_lpar_hpte_find(vpn, psize, ssize); |
27828f98 DG |
519 | if (slot == -1) |
520 | return -ENOENT; | |
521 | ||
db3d8534 AK |
522 | /* |
523 | * lpar doesn't use the passed actual page size | |
524 | */ | |
525 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0); | |
27828f98 | 526 | return 0; |
f8c8803b BP |
527 | } |
528 | ||
1da177e4 LT |
529 | /* |
530 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie | |
531 | * lock. | |
532 | */ | |
035223fb | 533 | static void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
1da177e4 | 534 | { |
5524a27d | 535 | unsigned long vpn; |
f03e64f2 | 536 | unsigned long i, pix, rc; |
12e86f92 | 537 | unsigned long flags = 0; |
69111bac | 538 | struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch); |
44ae3ab3 | 539 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
f03e64f2 | 540 | unsigned long param[9]; |
f03e64f2 PM |
541 | unsigned long hash, index, shift, hidx, slot; |
542 | real_pte_t pte; | |
1189be65 | 543 | int psize, ssize; |
1da177e4 LT |
544 | |
545 | if (lock_tlbie) | |
546 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); | |
547 | ||
f03e64f2 | 548 | psize = batch->psize; |
1189be65 | 549 | ssize = batch->ssize; |
f03e64f2 PM |
550 | pix = 0; |
551 | for (i = 0; i < number; i++) { | |
5524a27d | 552 | vpn = batch->vpn[i]; |
f03e64f2 | 553 | pte = batch->pte[i]; |
5524a27d AK |
554 | pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) { |
555 | hash = hpt_hash(vpn, shift, ssize); | |
f03e64f2 PM |
556 | hidx = __rpte_to_hidx(pte, index); |
557 | if (hidx & _PTEIDX_SECONDARY) | |
558 | hash = ~hash; | |
559 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; | |
560 | slot += hidx & _PTEIDX_GROUP_IX; | |
12e86f92 | 561 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
db3d8534 AK |
562 | /* |
563 | * lpar doesn't use the passed actual page size | |
564 | */ | |
5524a27d | 565 | pSeries_lpar_hpte_invalidate(slot, vpn, psize, |
db3d8534 | 566 | 0, ssize, local); |
12e86f92 PM |
567 | } else { |
568 | param[pix] = HBR_REQUEST | HBR_AVPN | slot; | |
5524a27d | 569 | param[pix+1] = hpte_encode_avpn(vpn, psize, |
1189be65 | 570 | ssize); |
12e86f92 PM |
571 | pix += 2; |
572 | if (pix == 8) { | |
573 | rc = plpar_hcall9(H_BULK_REMOVE, param, | |
f03e64f2 PM |
574 | param[0], param[1], param[2], |
575 | param[3], param[4], param[5], | |
576 | param[6], param[7]); | |
12e86f92 PM |
577 | BUG_ON(rc != H_SUCCESS); |
578 | pix = 0; | |
579 | } | |
f03e64f2 PM |
580 | } |
581 | } pte_iterate_hashed_end(); | |
582 | } | |
583 | if (pix) { | |
584 | param[pix] = HBR_END; | |
585 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], | |
586 | param[2], param[3], param[4], param[5], | |
587 | param[6], param[7]); | |
588 | BUG_ON(rc != H_SUCCESS); | |
589 | } | |
1da177e4 LT |
590 | |
591 | if (lock_tlbie) | |
592 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); | |
593 | } | |
594 | ||
4e89a2d8 WS |
595 | static int __init disable_bulk_remove(char *str) |
596 | { | |
597 | if (strcmp(str, "off") == 0 && | |
598 | firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { | |
599 | printk(KERN_INFO "Disabling BULK_REMOVE firmware feature"); | |
600 | powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE; | |
601 | } | |
602 | return 1; | |
603 | } | |
604 | ||
605 | __setup("bulk_remove=", disable_bulk_remove); | |
606 | ||
7d0daae4 | 607 | void __init hpte_init_lpar(void) |
1da177e4 LT |
608 | { |
609 | ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; | |
610 | ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; | |
611 | ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; | |
612 | ppc_md.hpte_insert = pSeries_lpar_hpte_insert; | |
613 | ppc_md.hpte_remove = pSeries_lpar_hpte_remove; | |
f8c8803b | 614 | ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; |
1da177e4 LT |
615 | ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; |
616 | ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; | |
1a527286 | 617 | ppc_md.hugepage_invalidate = pSeries_lpar_hugepage_invalidate; |
1da177e4 | 618 | } |
14f966e7 RJ |
619 | |
620 | #ifdef CONFIG_PPC_SMLPAR | |
621 | #define CMO_FREE_HINT_DEFAULT 1 | |
622 | static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; | |
623 | ||
624 | static int __init cmo_free_hint(char *str) | |
625 | { | |
626 | char *parm; | |
627 | parm = strstrip(str); | |
628 | ||
629 | if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) { | |
630 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n"); | |
631 | cmo_free_hint_flag = 0; | |
632 | return 1; | |
633 | } | |
634 | ||
635 | cmo_free_hint_flag = 1; | |
636 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n"); | |
637 | ||
638 | if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0) | |
639 | return 1; | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | __setup("cmo_free_hint=", cmo_free_hint); | |
645 | ||
646 | static void pSeries_set_page_state(struct page *page, int order, | |
647 | unsigned long state) | |
648 | { | |
649 | int i, j; | |
650 | unsigned long cmo_page_sz, addr; | |
651 | ||
652 | cmo_page_sz = cmo_get_page_size(); | |
653 | addr = __pa((unsigned long)page_address(page)); | |
654 | ||
655 | for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) { | |
656 | for (j = 0; j < PAGE_SIZE; j += cmo_page_sz) | |
657 | plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0); | |
658 | } | |
659 | } | |
660 | ||
661 | void arch_free_page(struct page *page, int order) | |
662 | { | |
d8c476ee AK |
663 | if (radix_enabled()) |
664 | return; | |
14f966e7 RJ |
665 | if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO)) |
666 | return; | |
667 | ||
668 | pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED); | |
669 | } | |
670 | EXPORT_SYMBOL(arch_free_page); | |
671 | ||
d8c476ee AK |
672 | #endif /* CONFIG_PPC_SMLPAR */ |
673 | #endif /* CONFIG_PPC_STD_MMU_64 */ | |
c8cd093a AB |
674 | |
675 | #ifdef CONFIG_TRACEPOINTS | |
d4fe0965 | 676 | #ifdef HAVE_JUMP_LABEL |
cc1adb5f AB |
677 | struct static_key hcall_tracepoint_key = STATIC_KEY_INIT; |
678 | ||
679 | void hcall_tracepoint_regfunc(void) | |
680 | { | |
681 | static_key_slow_inc(&hcall_tracepoint_key); | |
682 | } | |
683 | ||
684 | void hcall_tracepoint_unregfunc(void) | |
685 | { | |
686 | static_key_slow_dec(&hcall_tracepoint_key); | |
687 | } | |
688 | #else | |
c8cd093a AB |
689 | /* |
690 | * We optimise our hcall path by placing hcall_tracepoint_refcount | |
691 | * directly in the TOC so we can check if the hcall tracepoints are | |
692 | * enabled via a single load. | |
693 | */ | |
694 | ||
695 | /* NB: reg/unreg are called while guarded with the tracepoints_mutex */ | |
696 | extern long hcall_tracepoint_refcount; | |
697 | ||
698 | void hcall_tracepoint_regfunc(void) | |
699 | { | |
700 | hcall_tracepoint_refcount++; | |
701 | } | |
702 | ||
703 | void hcall_tracepoint_unregfunc(void) | |
704 | { | |
705 | hcall_tracepoint_refcount--; | |
706 | } | |
cc1adb5f AB |
707 | #endif |
708 | ||
709 | /* | |
710 | * Since the tracing code might execute hcalls we need to guard against | |
711 | * recursion. One example of this are spinlocks calling H_YIELD on | |
712 | * shared processor partitions. | |
713 | */ | |
714 | static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); | |
715 | ||
c8cd093a | 716 | |
6f26353c | 717 | void __trace_hcall_entry(unsigned long opcode, unsigned long *args) |
c8cd093a | 718 | { |
57cdfdf8 AB |
719 | unsigned long flags; |
720 | unsigned int *depth; | |
721 | ||
a5ccfee0 AB |
722 | /* |
723 | * We cannot call tracepoints inside RCU idle regions which | |
724 | * means we must not trace H_CEDE. | |
725 | */ | |
726 | if (opcode == H_CEDE) | |
727 | return; | |
728 | ||
57cdfdf8 AB |
729 | local_irq_save(flags); |
730 | ||
69111bac | 731 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
732 | |
733 | if (*depth) | |
734 | goto out; | |
735 | ||
736 | (*depth)++; | |
e4f387d8 | 737 | preempt_disable(); |
6f26353c | 738 | trace_hcall_entry(opcode, args); |
57cdfdf8 AB |
739 | (*depth)--; |
740 | ||
741 | out: | |
742 | local_irq_restore(flags); | |
c8cd093a AB |
743 | } |
744 | ||
6f26353c AB |
745 | void __trace_hcall_exit(long opcode, unsigned long retval, |
746 | unsigned long *retbuf) | |
c8cd093a | 747 | { |
57cdfdf8 AB |
748 | unsigned long flags; |
749 | unsigned int *depth; | |
750 | ||
a5ccfee0 AB |
751 | if (opcode == H_CEDE) |
752 | return; | |
753 | ||
57cdfdf8 AB |
754 | local_irq_save(flags); |
755 | ||
69111bac | 756 | depth = this_cpu_ptr(&hcall_trace_depth); |
57cdfdf8 AB |
757 | |
758 | if (*depth) | |
759 | goto out; | |
760 | ||
761 | (*depth)++; | |
6f26353c | 762 | trace_hcall_exit(opcode, retval, retbuf); |
e4f387d8 | 763 | preempt_enable(); |
57cdfdf8 AB |
764 | (*depth)--; |
765 | ||
766 | out: | |
767 | local_irq_restore(flags); | |
c8cd093a AB |
768 | } |
769 | #endif | |
9ee820fa BK |
770 | |
771 | /** | |
772 | * h_get_mpp | |
773 | * H_GET_MPP hcall returns info in 7 parms | |
774 | */ | |
775 | int h_get_mpp(struct hvcall_mpp_data *mpp_data) | |
776 | { | |
777 | int rc; | |
778 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
779 | ||
780 | rc = plpar_hcall9(H_GET_MPP, retbuf); | |
781 | ||
782 | mpp_data->entitled_mem = retbuf[0]; | |
783 | mpp_data->mapped_mem = retbuf[1]; | |
784 | ||
785 | mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
786 | mpp_data->pool_num = retbuf[2] & 0xffff; | |
787 | ||
788 | mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; | |
789 | mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; | |
b0d436c7 | 790 | mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL; |
9ee820fa BK |
791 | |
792 | mpp_data->pool_size = retbuf[4]; | |
793 | mpp_data->loan_request = retbuf[5]; | |
794 | mpp_data->backing_mem = retbuf[6]; | |
795 | ||
796 | return rc; | |
797 | } | |
798 | EXPORT_SYMBOL(h_get_mpp); | |
799 | ||
800 | int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) | |
801 | { | |
802 | int rc; | |
803 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 }; | |
804 | ||
805 | rc = plpar_hcall9(H_GET_MPP_X, retbuf); | |
806 | ||
807 | mpp_x_data->coalesced_bytes = retbuf[0]; | |
808 | mpp_x_data->pool_coalesced_bytes = retbuf[1]; | |
809 | mpp_x_data->pool_purr_cycles = retbuf[2]; | |
810 | mpp_x_data->pool_spurr_cycles = retbuf[3]; | |
811 | ||
812 | return rc; | |
813 | } |